Interesting. I just take two swipes (once in, once out) with a nylon brush on my 6.5 Swede cases. Heck.....I don't even do that on my .223's 'cause when I look at the pile I have to reload of them......I just roll my eyes and say "nah....that ain't happining"!!! My .223's are actually the most accurate loads I have. What does that tell you?